带有 POST“超时”的 HttpURLConnection在 ICS 上,在 HC 工作
由于登录问题,我的 Android 平板电脑应用程序无法与 ICS 一起使用。当我查看我的代码并在 ICS 平板电脑上的调试模式下运行它时,我看到了问题,但我不明白它。该代码在我测试过的所有 Honeycomb 型号上都能正确运行,事实上,我有两台平板电脑连接到我的计算机(一台运行 3.2 的三星 Galaxy Tab,一台运行 4.0.3 的摩托罗拉 Xoom wifi),代码在 ICS 上失败,但可以正常工作在HC上。
失败是套接字超时异常。超时是2000ms,但是我把它提高到100000ms来测试,没有影响。
使用 ICS 平板电脑上的浏览器,我可以访问该 URL 并且它会做出响应,因此它似乎与网络无关。
我正在使用 AsyncTask 在后台线程上运行。
Slurp 只是从 InputStream 获取所有输入,并使用 StringBuilder 创建字符串表示形式。它在此请求中实际上没有用,但我添加它是为了查看服务器正在回复什么。
我以与用户使用表单进行身份验证的方式相同的方式发布到页面,这就是我使用 x-www-form-urlencoded 的原因。
同样,此代码在 Honeycomb 上运行完美,但在 ICS 上失败。
该代码建立了连接,但在请求服务器响应时失败,几乎就像服务器仍在等待某些东西一样......无论如何,这里是代码:
static public String authenticate(String service_url, String username, String password) throws IOException {
if (username == null || password == null)
throw new IOException();
String charset = "UTF-8";
String query = String.format("Email=%s&Password=%s",URLEncoder.encode(username, charset),URLEncoder.encode(password, charset));
byte [] data = query.getBytes(charset);
URL url = new URL(service_url);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
connection.setRequestProperty("Accept-Charset", charset);
connection.setRequestProperty("Content-Length", Integer.toString(data.length));
connection.setDoOutput(true);
connection.setRequestMethod("POST");
connection.setReadTimeout(5000); // 2 second timeout.
try {
connection.connect();
DataOutputStream pw = new DataOutputStream (connection.getOutputStream());
pw.writeBytes(query);
pw.flush();
pw.close();
int code = connection.getResponseCode(); //SOCKET TIMEOUT HERE
if (code == 200 || code == 302)
{
InputStream is = connection.getInputStream();
String value = slurp(is);
List<String> cookies = connection.getHeaderFields().get("Set-Cookie");
if (cookies == null)
throw new IOException();
for (String cookie : cookies) {
if (cookie.startsWith("cpms")) {
cookieTime = new DateTime(); //crazy but the expires time in the cookie is not actually accurate.
return cookie; // this is the only correct path out.
}
}
}
else
Logger.e(StaticUtils.class, "Invalid response code while logging in: " + code);
}
catch (IOException ioe)
{
Logger.e(StaticUtils.class, ioe);
throw ioe; // log it and then throw it back.
} finally {
connection.disconnect();
}
return null;
}
My Android tablet application does not work with ICS due to a Login problem. When I looked at my code and ran it under debug mode on an ICS tablet, I see the problem but I don't understand it. The code functions correctly on all Honeycomb models that i have tested and in fact I have two tablets hooked up to my computer (one Samsung Galaxy Tab running 3.2, and a Motorola Xoom wifi running 4.0.3) and the code fails on ICS and works on HC.
The failure is a Socket Timeout exception. The timeout was 2000ms, but I upped it to 100000ms to test and it had no impact.
Using the browser on the ICS tablet, I can go to the URL and it responds, so it doesn't appear to be network related.
I am running on a background thread using AsyncTask.
Slurp just takes all of the input from the InputStream and using StringBuilder creates a string representation. Its not actually useful in this request but I added it to see what the server was replying with.
I am POSTing to the page the same way a user authenticates using the form, which is why I am using x-www-form-urlencoded.
Again, this code functions perfectly on Honeycomb but fails on ICS.
The code makes a connection but fails when it asks for a response from the server, almost like the server is still waiting for something... anyway, here is the code:
static public String authenticate(String service_url, String username, String password) throws IOException {
if (username == null || password == null)
throw new IOException();
String charset = "UTF-8";
String query = String.format("Email=%s&Password=%s",URLEncoder.encode(username, charset),URLEncoder.encode(password, charset));
byte [] data = query.getBytes(charset);
URL url = new URL(service_url);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
connection.setRequestProperty("Accept-Charset", charset);
connection.setRequestProperty("Content-Length", Integer.toString(data.length));
connection.setDoOutput(true);
connection.setRequestMethod("POST");
connection.setReadTimeout(5000); // 2 second timeout.
try {
connection.connect();
DataOutputStream pw = new DataOutputStream (connection.getOutputStream());
pw.writeBytes(query);
pw.flush();
pw.close();
int code = connection.getResponseCode(); //SOCKET TIMEOUT HERE
if (code == 200 || code == 302)
{
InputStream is = connection.getInputStream();
String value = slurp(is);
List<String> cookies = connection.getHeaderFields().get("Set-Cookie");
if (cookies == null)
throw new IOException();
for (String cookie : cookies) {
if (cookie.startsWith("cpms")) {
cookieTime = new DateTime(); //crazy but the expires time in the cookie is not actually accurate.
return cookie; // this is the only correct path out.
}
}
}
else
Logger.e(StaticUtils.class, "Invalid response code while logging in: " + code);
}
catch (IOException ioe)
{
Logger.e(StaticUtils.class, ioe);
throw ioe; // log it and then throw it back.
} finally {
connection.disconnect();
}
return null;
}
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